4.98+8.02*3.5怎么简便运算

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4.98+8.02*3.5怎么简便运算4.98+8.02*3.5怎么简便运算4.98+8.02*3.5怎么简便运算4.98+8.02×3.5=5-0.02+(8+0.02)×3.5=5-0.02+8×

4.98+8.02*3.5怎么简便运算
4.98+8.02*3.5怎么简便运算

4.98+8.02*3.5怎么简便运算
4.98+8.02×3.5
=5-0.02+(8+0.02)×3.5
=5-0.02+8×3.5+0.02×3.5
=5+28+0.02×(3.5-1)
=33+0.02×2.5
=33+0.05
=33.05

4.98+8.02*3.5
=(4.98+8.02 )+8.02×1.5
=13+12.03
=25.03

7/3.5+0.7/3.5=2.2 先都扩大十倍再除啊 7.7÷3.5=77/35=70/35+7/35=2+0.2=2.2