请大将帮我计算下面的计算题,运用乘法运算律,递等式的,752×1.25+4.45×12.5+0.035×125====0.42×160+36×1.6-31×3.2====1.625+2.625+3.625+…+79.625+80.625====
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![请大将帮我计算下面的计算题,运用乘法运算律,递等式的,752×1.25+4.45×12.5+0.035×125====0.42×160+36×1.6-31×3.2====1.625+2.625+3.625+…+79.625+80.625====](/uploads/image/z/8812786-58-6.jpg?t=%E8%AF%B7%E5%A4%A7%E5%B0%86%E5%B8%AE%E6%88%91%E8%AE%A1%E7%AE%97%E4%B8%8B%E9%9D%A2%E7%9A%84%E8%AE%A1%E7%AE%97%E9%A2%98%2C%E8%BF%90%E7%94%A8%E4%B9%98%E6%B3%95%E8%BF%90%E7%AE%97%E5%BE%8B%2C%E9%80%92%E7%AD%89%E5%BC%8F%E7%9A%84%2C752%C3%971.25%2B4.45%C3%9712.5%2B0.035%C3%97125%3D%3D%3D%3D0.42%C3%97160%2B36%C3%971.6-31%C3%973.2%3D%3D%3D%3D1.625%2B2.625%2B3.625%2B%E2%80%A6%2B79.625%2B80.625%3D%3D%3D%3D)
请大将帮我计算下面的计算题,运用乘法运算律,递等式的,752×1.25+4.45×12.5+0.035×125====0.42×160+36×1.6-31×3.2====1.625+2.625+3.625+…+79.625+80.625====
请大将帮我计算下面的计算题,运用乘法运算律,递等式的,
752×1.25+4.45×12.5+0.035×125
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0.42×160+36×1.6-31×3.2
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1.625+2.625+3.625+…+79.625+80.625
=
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请大将帮我计算下面的计算题,运用乘法运算律,递等式的,752×1.25+4.45×12.5+0.035×125====0.42×160+36×1.6-31×3.2====1.625+2.625+3.625+…+79.625+80.625====
752×1.25+4.45×12.5+0.035×125
=(7.52+0.445+0.035)x125
=8x125
=1000
0.42×160+36×1.6-31×3.2
=(42+36-62)x1.6
=16x1.6
=25.6
1.625+2.625+3.625+…+79.625+80.625
=(1+79)+(2+78)+(3+77)+...+80+(0.625x80)
=3200+50
=3250
=(7.52+0.445+0.035)x125
=8x125
=1000
=(42+36-62)x1.6
=16x1.6
=25.6
=(1.625+80.625)x40
=82.25x40
=3290
=(7.52+0.445+0.035)x125
=8x125
=1000
=(42+36-62)x1.6
=16x1.6
=25.6
=(1.625+80.625)x40
=82.25x40
=3290
15、138+(27+48)÷25 16、56×19+25×8 二、用简便方法计算。 1、368+2649+1351 2、 89+101+111 3、24+127+476+573 4、400-273-