Question

13×(10+2)=13×10+13×2 15×(10×2)=15×10×2(20+5)×4=20+5×472:(8×3)=72:8×3

Answer 1

1) 130+26=156

2)300

3)100

4)27

Answer 2

Let's evaluate the expressions step by step:

1. 13×(10+2) = 13×12 = 156

2. 15×(10×2) = 15×20 = 300

3. (20+5)×4 = 25×4 = 100

4. 472:(8×3) = 472:24 = 19.666... (recurring decimal)

5. 72:8×3 = 9×3 = 27

So, the correct evaluations are:

1. 13×(10+2) = 156
2. 15×(10×2) = 300
3. (20+5)×4 = 100
4. 472:(8×3) = 19.666...
5. 72:8×3 = 27