Question

Решить примеры 10·(7·9-7·8); 80-(8·4+8·6); 130-5·8+8·5; 24:(200-196);5·4:10+58;18:9·(8+42);(71-66)·(14-8);(23-14)·(42-34)

Answer 1

10 * (7*9 - 7*8) = 10* (63 - 56) = 10*7 = 70
80 - (8*4 + 8*6) = 80 - (32 + 48) = 80 - 80 = 0
130 - 5*8 + 8*5 = 130 - 40 + 40 = 130
24 : ( 200 - 196) = 24 : 4 = 6
5 * 4 : 10 + 58 = 20 : 10 + 58 = 2 + 58 = 60
18 : 9 *(8 + 42) = 2 * 50 = 100
(71 - 66) * (14 - 8) = 5 * 6 = 30
(23 -14) * (42 - 34) = 9 * 8 = 72

Answer 2

1)10*(7*9-7*8)=10*(63-56)=10*7=70                                                                      2)80-(8*4+8*6)=80-(32+48)=80-80=0                                                                     3)130-5*8+8*5=130-40+40=90+40=130                                                                 4)24:(200-196)=24:4=6                                                                                       5)5*4:10+58=20:10+58=2+58=60                                                                         6)18:9*(8+42)=2*(8+42)=2*50=100                                                                       7)(71-66)*(14-8)=5*6=30                                                                                     8)(23-14)*(42-34)=9*8=72                                              

Answer 3

1) 10·(7·9-7·8) First, we simplify the parentheses: 7·9 = 63 7·8 = 56 Now we substitute these values back into the expression: 10·(63-56) Next, we simplify the subtraction inside the parentheses: 63-56 = 7 Now we substitute this value back into the expression: 10·7 = 70 Therefore, the answer is 70.

2) 80-(8·4+8·6) First, we simplify the addition inside the parentheses: 8·4 = 32 8·6 = 48 Now we substitute these values back into the expression: 80-(32+48) Next, we simplify the addition inside the parentheses: 32+48 = 80 Now we substitute this value back into the expression: 80-80 = 0 Therefore, the answer is 0.

3) 130-5·8+8·5 First, we simplify the multiplication: 5·8 = 40 8·5 = 40 Now we substitute these values back into the expression: 130-40+40 Next, we perform the subtraction: 130-40 = 90 Now we substitute this value back into the expression: 90+40 = 130 Therefore, the answer is 130.

4) 24:(200-196) First, we simplify the subtraction inside the parentheses: 200-196 = 4 Now we substitute this value back into the expression: 24:4 Next, we perform the division: 24 ÷ 4 = 6 Therefore, the answer is 6.

5) 5·4:10+58 First, we simplify the multiplication: 5·4 = 20 Now we substitute this value back into the expression: 20:10+58 Next, we perform the division: 20 ÷ 10 = 2 Now we substitute this value back into the expression: 2+58 = 60 Therefore, the answer is 60.

6) 18:9·(8+42) First, we simplify the addition inside the parentheses: 8+42 = 50 Now we substitute this value back into the expression: 18:9·50 Next, we perform the division: 18 ÷ 9 = 2 Now we substitute this value back into the expression: 2·50 = 100 Therefore, the answer is 100.

7) (71-66)·(14-8) First, we simplify the subtraction inside the parentheses: 71-66 = 5 14-8 = 6 Now we substitute these values back into the expression: 5·6 = 30 Therefore, the answer is 30.

8) (23-14)·(42-34) First, we simplify the subtraction inside the parentheses: 23-14 = 9 42-34 = 8 Now we substitute these values back into the expression: 9·8 = 72 Therefore, the answer is 72.