脱式计算(能简便算的要简便算)(1)0.01+1.01×99  ...
脱式计算(能简便算的要简便算)(1)0.01+1.01×99(2)26×20.2-8.4-1.8(3)89.3×43+38×89.3+893×1.9(4)10.01×10...
脱式计算(能简便算的要简便算)(1)0.01+1.01×99 (2)26×20.2-8.4-1.8(3)89.3×43+38×89.3+893×1.9 (4)10.01×101-10.01.
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(1)0.01+1.01×99, =0.01+1.01×(100-1), =0.01+1.01×100-1.01×1, =101+0.01-1.01, =100; (2)26×20.2-8.4-1.8, =26×(20+0.2)-(8.4+1.8), =520+5.2-10.2, =525.2-10.2, =515; (3)89.3×43+38×89.3+893×1.9, =89.3×43+38×89.3+89.3×19, =89.3×(43+38+19), =89.3×100, =8930; (4)10.01×101-10.01, =10.01×101-10.01×1, =10.01×(101-1), =10.01×100, =1001. |
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