1. 直接写出得数。
$56 + 28 =$ $18 ÷ 3 =$ $7 × 4 =$ $2 × 8 + 4 =$
$36 ÷ 6 =$ $48 ÷ 8 =$ $300 + 80 =$ $18 ÷ 2 ÷ 3 =$
$37 - 15 =$ $48 + 12 =$ $24 ÷ 4 =$ $9 × 5 + 10 =$
$64 ÷ 8 =$ $700 + 20 =$ $47 - 19 =$ $40 - 20 - 15 =$
$21 ÷ 7 =$ $40 - 18 =$ $62 + 26 =$ $4 × 2 × 8 =$
$34 + 43 =$ $5 × 8 =$ $63 ÷ 9 =$ $34 + 16 + 16 =$
$9 × 3 =$ $32 ÷ 8 =$ $5 × 6 =$ $54 ÷ 6 - 4 =$
$47 - 20 =$ $880 - 80 =$ $28 + 34 =$ $4 × 4 ÷ 4 =$
$56 + 28 =$ $18 ÷ 3 =$ $7 × 4 =$ $2 × 8 + 4 =$
$36 ÷ 6 =$ $48 ÷ 8 =$ $300 + 80 =$ $18 ÷ 2 ÷ 3 =$
$37 - 15 =$ $48 + 12 =$ $24 ÷ 4 =$ $9 × 5 + 10 =$
$64 ÷ 8 =$ $700 + 20 =$ $47 - 19 =$ $40 - 20 - 15 =$
$21 ÷ 7 =$ $40 - 18 =$ $62 + 26 =$ $4 × 2 × 8 =$
$34 + 43 =$ $5 × 8 =$ $63 ÷ 9 =$ $34 + 16 + 16 =$
$9 × 3 =$ $32 ÷ 8 =$ $5 × 6 =$ $54 ÷ 6 - 4 =$
$47 - 20 =$ $880 - 80 =$ $28 + 34 =$ $4 × 4 ÷ 4 =$
答案
1. 84 6 28 20 6 6 380 3 22 60 6 55 8 720 28 5 3 22 88 64 77 40 7 66 27 4 30 5 27 800 62 4
2. 在$◯$里填“$>$”“$<$”或“$=$”。
$4 × 7 ◯ 5 × 6$ $40 ÷ 8 ◯ 10 - 5$ $16 ÷ 8 ◯ 16 - 8$
$3 × 6 ◯ 8 × 2$ $56 ÷ 8 ◯ 14 ÷ 2$ $200 + 40 ◯ 340 - 40$
$4 × 7 ◯ 5 × 6$ $40 ÷ 8 ◯ 10 - 5$ $16 ÷ 8 ◯ 16 - 8$
$3 × 6 ◯ 8 × 2$ $56 ÷ 8 ◯ 14 ÷ 2$ $200 + 40 ◯ 340 - 40$
答案
2. < = < > = <
3. 在(
(
(
6
)里填合适的数。(
6
)$× 7 = 42$ (970
)$- 70 = 900$ $8 × 5 - 5 =$(7
)$× 5$(
5
)$× 9 = 45$ (200
)$+ 30 = 230$ $400 +$(60
)$= 460$答案
3. 6 970 7 5 200 60
将 3 张一样大小的长方形纸条如下图这样重叠粘合在一起,得到一个长 21 厘米的长纸条,每两张纸条之间的重叠部分长 3 厘米,原来每张纸条长( )厘米。
答案
9
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