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120×4 = ______ 250×40 = ______

想一想. 120×4 = ______ 250×40 = ______. 480. 10000. 150×10 得 1500 , 150×2 得 300 , 比 1800 千米少一些。. 李叔叔从某城市乘火车去北京用了 12 小时,火车 1 小时约行 145 千米。该城市到北京大约有多少千米?. 145×12 = _____ (千米). 我用计算器验算过了,你算对了, 是 1740 。. 用笔算比较准确,得 ……. 1 4 5 × 1 2. 2 9 0. 1 4 5. 1 7 4 0. 答:该城市到北京大约有 1740 千米。. 做一做.

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120×4 = ______ 250×40 = ______

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  1. 想一想 120×4 = ______ 250×40 = ______ 480 10000

  2. 150×10得1500, 150×2得300, 比1800千米少一些。 李叔叔从某城市乘火车去北京用了12小时,火车1小时约行145千米。该城市到北京大约有多少千米? 145×12 = _____(千米)

  3. 我用计算器验算过了,你算对了,是1740。 用笔算比较准确,得…… 1 4 5 × 1 2 2 9 0 1 4 5 1 7 4 0 答:该城市到北京大约有1740千米。

  4. 做一做 134 176 425 237 ×12 ×47 ×36 ×12 474 268 1232 2550 134 704 1275 237 1608 8272 15300 2844

  5. 学校准备发练习本,发给15个班,每班144本,还需要留40本作为备用。学校应买多少本练习本?学校准备发练习本,发给15个班,每班144本,还需要留40本作为备用。学校应买多少本练习本? 解:15×144 + 40 = (本) 2200 1 4 4 × 1 5 7 2 0 2160 + 40 = 2200 1 4 4 2 1 6 0 答:学校应买2200本练习本。

  6. 一列火车可乘人数情况如下表 这列火车可乘( )人 1454

  7. 说出下面计算中的错误,并把它改正过来。 1 3 4 1 5 2 2 4 6 × 1 6 × 2 3 × 3 4 8 0 4 1 5 6 9 6 4 1 3 4 1 0 4 6 3 8 9 3 8 1 1 9 6 7 3 4 4

  8. 一个因数是11的乘法怎样速算? 下面的题,你能不写竖式,直接口算出得数吗? 121×11 134×11 158×11 167×11

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