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1. 直接写出得数。
$270 + 40 =$ $380 + 460 =$ $520 - 107 =$ $40×3×2 =$
$508×2 =$ $160÷2 =$ $0÷36 =$ $4×(6 + 16) =$
$103×7 =$ $50×29 =$ $70÷2 =$ $360÷(27÷3) =$
$58×20 =$ $92÷2 =$ $55×2 =$ $80×8 - 80 =$
$30×19 =$ $307×9 =$ $78÷6 =$ $500×3 + 50 =$
$106×8 =$ $840÷8 =$ $406÷2 =$ $47 - 120÷6 =$
$62 - 18 =$ $44 + 28 =$ $52×59≈$ $1200 + 800 + 900 =$
$2300 - 500 =$ $140 - 60 =$ $68×61≈$ $2500 - 600 + 700 =$
$270 + 40 =$ $380 + 460 =$ $520 - 107 =$ $40×3×2 =$
$508×2 =$ $160÷2 =$ $0÷36 =$ $4×(6 + 16) =$
$103×7 =$ $50×29 =$ $70÷2 =$ $360÷(27÷3) =$
$58×20 =$ $92÷2 =$ $55×2 =$ $80×8 - 80 =$
$30×19 =$ $307×9 =$ $78÷6 =$ $500×3 + 50 =$
$106×8 =$ $840÷8 =$ $406÷2 =$ $47 - 120÷6 =$
$62 - 18 =$ $44 + 28 =$ $52×59≈$ $1200 + 800 + 900 =$
$2300 - 500 =$ $140 - 60 =$ $68×61≈$ $2500 - 600 + 700 =$
答案
1. 310 840 413 240
1016 80 0 88
721 1450 35 40
1160 46 110 560
570 2763 13 1550
848 105 203 27
44 72 3000 2900
1800 80 4200 2600
1016 80 0 88
721 1450 35 40
1160 46 110 560
570 2763 13 1550
848 105 203 27
44 72 3000 2900
1800 80 4200 2600
2. 计算下面各题。
$28×(71 - 34)$ $311 - 256÷8$ $(161 + 84)÷7$
$28×(71 - 34)$ $311 - 256÷8$ $(161 + 84)÷7$
答案
2. 1036 279 35
(1)
有(
(2)
有(
有(4
)组垂线 有(8
)个直角(2)
有(5
)组垂线 有(8
)个直角答案
·思维提升
(1) 4 8 (2) 5 8
(1) 4 8 (2) 5 8
