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1 直接写出得数。(每题1分,共20分)
$456 - 123 = $ $427 + 51 = $ $678×3 = $ $789×70 = $
$714÷3 = $ $92 - 27 = $ $765 + 432 = $ $574 - 12 = $
$321×8 = $ $891×80 = $ $432÷8 = $ $613 + 548 = $
$35 + 48 + 52 = $ $25×2×7 = $ $138 + 66 + 34 = $ $24 + 89 + 176 = $
$90×30÷27 = $ $672 - 172 - 28 = $ $631 - 231 + 69 = $ $660÷(45 - 35) = $
$456 - 123 = $ $427 + 51 = $ $678×3 = $ $789×70 = $
$714÷3 = $ $92 - 27 = $ $765 + 432 = $ $574 - 12 = $
$321×8 = $ $891×80 = $ $432÷8 = $ $613 + 548 = $
$35 + 48 + 52 = $ $25×2×7 = $ $138 + 66 + 34 = $ $24 + 89 + 176 = $
$90×30÷27 = $ $672 - 172 - 28 = $ $631 - 231 + 69 = $ $660÷(45 - 35) = $
答案
333 478 2034 55230
238 65 1197 562
2568 71280 54 1161
135 350 238 289
100 472 469 66
238 65 1197 562
2568 71280 54 1161
135 350 238 289
100 472 469 66
2 列竖式计算,带※的要验算。(每题3分,共12分)
$952÷28 = $ $410×90 = $ $309×14 = $ ※$658÷47 = $
$952÷28 = $ $410×90 = $ $309×14 = $ ※$658÷47 = $
答案
竖式及验算略
34 36900 4326 14
34 36900 4326 14
3 计算下面各题,能简算的要简算。(每题3分,共18分)
$236 + 189 + 64$ $345 + 45 + 255$ $216 + 89 + 411 + 84$
$749 - 65 - 49$ $600 - 63 - 37$ $867 - (86 + 67)$
$236 + 189 + 64$ $345 + 45 + 255$ $216 + 89 + 411 + 84$
$749 - 65 - 49$ $600 - 63 - 37$ $867 - (86 + 67)$
答案
489 645 800
635 500 714
635 500 714
