递等式计算,能简便的用简便方法计算 5.41+3.46-2.46 2.03-0.18-2.82+7.97
递等式计算,能简便的用简便方法计算5.41+3.46-2.462.03-0.18-2.82+7.9710-4.44-5.5632.63+7.89-6.4125×25×32...
递等式计算,能简便的用简便方法计算 5.41+3.46-2.46 2.03-0.18-2.82+7.97 10-4.44-5.56 32.63+7.89-6.4 125×25×32 97×88.
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(1)5.41+3.46-2.46, =5.41+(3.46-2.46), =5.41+1, =6.41; (2)2.03-0.18-2.82+7.97, =(2.03+7.97)-(0.18+2.82), =10-3, =7; (3)10-4.44-5.56, =10-(4.44+5.56), =10-10, =0; (4)32.63+7.89-6.4, =40.52-6.4, =34.12; (5)125×25×32, =125×25×(8×4), =(125×8)×(25×4), =1000×100, =100000; (6)97×88, =(100-3)×88, =100×88-3×88, =8800-264, =8536. |
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