Question

вычисли разными способами.Подчеркни рацыональный способ. (150+20)÷5= 2)(452+148)÷2=3) 50×(2+12)=4)(819+45)÷3=​

Answer 1

Пошаговое объяснение:

1) (150+20):5=(150:5)+(20:5)=30+4=34 (рациональный способ).

(150+20):5=170:5=34

2) (452+148):2=(452:2)+(148:2)=226+74=300

(452+148):2=600:2=300 (рациональный способ).

3) 50×(2+12)=(50×2)+(50×12)=100+600=700 (рациональный способ).

50×(2+12)=50×14=700

4) (819+45):3=(819:3)+(45:3)=273+15=288 (рациональный способ).

(819+45):3=864:3=288

Answer 2

1. (150+20)÷5 = 170 ÷ 5 = 34

In this case, there is only one method, which is to perform the addition first and then divide the result by 5.

2. (452+148)÷2 = 600 ÷ 2 = 300

Again, there is only one method here. First, perform the addition and then divide the sum by 2.

3. 50×(2+12) = 50 × 14 = 700

In this case, the rational method is to perform the addition within the parentheses first, resulting in 50 × 14.

4. (819+45)÷3 = 864 ÷ 3 = 288

The rational approach is to add 819 and 45 first, and then divide the sum by 3.

So, in all the given expressions, there is only one rational method to solve each of them.