1. 直接写出得数。
$304 + 298 =$ $880 - 149 =$ $27×3 =$ $10×70 - 490 =$
$18×40 =$ $180÷6 =$ $360÷9 =$ $600 - 105×3 =$
$50×16 =$ $33×30 =$ $8×35 =$ $(90 + 30)÷5 =$
$20×38 =$ $93×4 =$ $490÷7 =$ $70×(30 + 40) =$
$30×29 =$ $240×5 =$ $104×8 =$ $24×20 - 60 =$
$40×52 =$ $220×6 =$ $11×55 =$ $51÷(39 - 36) =$
$66×20 =$ $490÷2 =$ $440÷8 =$ $460÷2 + 250 =$
$155÷5 =$ $32×80 =$ $72×30 =$ $(22 + 22)÷4 =$
$304 + 298 =$ $880 - 149 =$ $27×3 =$ $10×70 - 490 =$
$18×40 =$ $180÷6 =$ $360÷9 =$ $600 - 105×3 =$
$50×16 =$ $33×30 =$ $8×35 =$ $(90 + 30)÷5 =$
$20×38 =$ $93×4 =$ $490÷7 =$ $70×(30 + 40) =$
$30×29 =$ $240×5 =$ $104×8 =$ $24×20 - 60 =$
$40×52 =$ $220×6 =$ $11×55 =$ $51÷(39 - 36) =$
$66×20 =$ $490÷2 =$ $440÷8 =$ $460÷2 + 250 =$
$155÷5 =$ $32×80 =$ $72×30 =$ $(22 + 22)÷4 =$
答案
1. 602 731 81 210
720 30 40 285
800 990 280 24
760 372 70 4900
870 1200 832 420
2080 1320 605 17
1320 245 55 480
31 2560 2160 11
720 30 40 285
800 990 280 24
760 372 70 4900
870 1200 832 420
2080 1320 605 17
1320 245 55 480
31 2560 2160 11
2. 用竖式计算,带☆的要验算。
$92×57 =$ ☆$48×47 =$ $60×96 =$
$53×89 =$ $83×24 =$ ☆$35×42 =$
$92×57 =$ ☆$48×47 =$ $60×96 =$
$53×89 =$ $83×24 =$ ☆$35×42 =$
答案
2. 5244 2256 5760
4717 1992 1470
竖式及验算略
4717 1992 1470
竖式及验算略
“890”在第(

二
)列。答案
思维提升
二
二
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