解:2十2x5%x10等于( 3 )
∵已知需求出2十2x5%x10等于多少
∴2 十 2 x 5% x 10
= 2 + 2 × 5/100 × 10
= 2 + 2 × 1/20 × 10
= 2 + 2/20 × 10
= 2 + 1/10 × 10
= 2 + 1
= 3
答:2十2x5%x10等于3
2x-50%x=30
解:2X-0.5X=30
1.5X=30
X=30÷1.5
X=20
2+2×5%×10
=2+0.1×10
=2+1
=3