怎样简便就怎样计算. 4.98+8.02×2.5 60.8-40.8÷2.5 0.8×69.6×12.5 4.98×99+4.9 6.48÷3.
怎样简便就怎样计算.4.98+8.02×2.560.8-40.8÷2.50.8×69.6×12.54.98×99+4.96.48÷3.2÷2.51.2×7.6+7.6×6...
怎样简便就怎样计算. 4.98+8.02×2.5 60.8-40.8÷2.5 0.8×69.6×12.5 4.98×99+4.9 6.48÷3.2÷2.5 1.2×7.6+7.6×6.8.
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(1)4.98+8.02×2.5, =4.98+20.25, =25.03; (2)60.8-40.8÷2.5, =60.8-16.32, =44.48; (3)0.8×69.6×12.5, =(0.8×12.5)×69.6, =10×69.6, =696; (4)4.98×99+4.9, =493.02+4.9, =497.92; (5)6.48÷3.2÷2.5, =6.48÷(3.2×2.5), =6.48÷8, =0.81; (6)1.2×7.6+7.6×6.8, =7.6×(1.2+6.8), =7.6×8, =60.8. |
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