计算下面各题.(1)用竖式计算,并验算.20.01-9.94=45.3÷75=(2)用你喜欢的方法计算.①960+1040÷(704-688)②6.25÷0.01-1.25×25×8③15.73-2.17-1.83+4.27④58×(25+13)÷23⑤-数学
题文
计算下面各题. (1)用竖式计算,并验算. 20.01-9.94= 45.3÷75= (2)用你喜欢的方法计算. ①960+1040÷(704-688) ②6.25÷0.01-1.25×25×8 ③15.73-2.17-1.83+4.27 ④
⑤3.5×
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答案
(1)20.01-9.94=10.07; 验算: 45.3÷75=0.604; 验算: (2)用你喜欢的方法计算. ①960+1040÷(704-688), =960+1040÷16, =960+65, =1025; ②6.25÷0.01-1.25×25×8, =625-250, =375; ③15.73-2.17-1.83+4.27, =(15.73+4.27)-(2.17+1.83), =20-4, =16; ④
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⑤3.5×
=2.8+4.4+0.8, =8; ⑥
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