脱式计算(能简算的要简算) 12.03-22.78÷3.4 4.78×99+4.78 2.5×6.9×4 28.8÷1
脱式计算(能简算的要简算)12.03-22.78÷3.44.78×99+4.782.5×6.9×428.8÷1.2×0.66.8+3.2÷2.58.6×3.3+2.7×8...
脱式计算(能简算的要简算) 12.03-22.78÷3.4 4.78×99+4.78 2.5×6.9×4 28.8÷1.2×0.6 6.8+3.2÷2.5 8.6×3.3+2.7×8.6.
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(1)12.03-22.78÷3.4, =12.03-6.7, =5.33; (2)4.78×99+4.78, =4.78×(99+1), =4.78×100, =478; (3)2.5×6.9×4, =2.5×4×6.9, =10×6.9, =69; (4)28.8÷1.2×0.6, =24×0.6, =14.4; (5)6.8+3.2÷2.5, =6.8+1.28, =8.08; (6)8.6×3.3+2.7×8.6, =8.6×(3.3+2.7), =8.6×6, =51.6. |
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