Question

硕硕在计算五十乘括号三角加把小括号硕硕在计算50乘括号3角加4把小括号丢了，写成50×3角加4那么？

Answer 1

50×括号里20-3括号起来的简便方法怎样做
=50×20-50×3
=1000-150
=850

Answer 2

X 50=支架x-5的3倍

x 50=3x-15
3x-x=50 15
2x=65
x=32.5

Answer 3

与正确值相差:50×（x+5）-（50x+5）=50×5-5 =245