问题描述:
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最佳答案:
(1)75+44+125+66+56, =(75+125)+(44+56)+66, =200+100+66, =366; (2)8×5×125×40, =(8×125)×(5×40), =1000×200, =200000; (3)78×45+21×45+45, =(78+21+1)×45, =100×45, =4500; (4)35×98, =35×(100-2), =35×100-35×2, =3500-70, =3430. |
75+44+125+66+568×5×125×4078×45+21×45+4535×98.
问题描述:
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(1)75+44+125+66+56, =(75+125)+(44+56)+66, =200+100+66, =366; (2)8×5×125×40, =(8×125)×(5×40), =1000×200, =200000; (3)78×45+21×45+45, =(78+21+1)×45, =100×45, =4500; (4)35×98, =35×(100-2), =35×100-35×2, =3500-70, =3430. |