一、口算。
$62 - 39 =$ $8×9 =$ $66÷6 =$
$31×3 =$ $80÷8 =$ $24×2 =$
$62÷2 =$ $20×3 =$ $42÷2 =$
$51 - 37 =$ $7×7 =$ $50÷9 =$
$13×3 =$ $28 + 19 =$ $62÷8 =$
$42÷7 =$ $23×2 =$ $5×11 =$
$4×7 =$ $54÷9 =$ $68÷2 =$
$12×4 =$ $33×2 =$ $42÷5 =$
$22×4 =$ $33 + 29 =$ $39÷3 =$
$70 - 22 =$ $23×3 =$ $90÷3 =$
$62 - 39 =$ $8×9 =$ $66÷6 =$
$31×3 =$ $80÷8 =$ $24×2 =$
$62÷2 =$ $20×3 =$ $42÷2 =$
$51 - 37 =$ $7×7 =$ $50÷9 =$
$13×3 =$ $28 + 19 =$ $62÷8 =$
$42÷7 =$ $23×2 =$ $5×11 =$
$4×7 =$ $54÷9 =$ $68÷2 =$
$12×4 =$ $33×2 =$ $42÷5 =$
$22×4 =$ $33 + 29 =$ $39÷3 =$
$70 - 22 =$ $23×3 =$ $90÷3 =$
答案
23 72 11
93 10 48
31 60 21
14 49 5……5
39 47 7……6
6 46 55
28 6 34
48 66 8……2
88 62 13
48 69 30
93 10 48
31 60 21
14 49 5……5
39 47 7……6
6 46 55
28 6 34
48 66 8……2
88 62 13
48 69 30
二、在(
$(\quad\quad) + 26 = 60$ $4×(\quad\quad) = 48$ $25 + (\quad\quad) = 40$
$4×(\quad\quad) = 88$ $(\quad\quad)×7 = 77$ $(\quad\quad)×3 = 36$
$2×(\quad\quad) = 82$ $2×(\quad\quad) = 28$ $(\quad\quad)×2 = 64$
$2×(\quad\quad) = 48$ $6×(\quad\quad) = 60$ $82 - (\quad\quad) = 34$
$(\quad\quad)×3 = 69$ $(\quad\quad)×9 = 45$ $(\quad\quad)×3 = 66$
34
)里填合适的数。$(\quad\quad) + 26 = 60$ $4×(\quad\quad) = 48$ $25 + (\quad\quad) = 40$
$4×(\quad\quad) = 88$ $(\quad\quad)×7 = 77$ $(\quad\quad)×3 = 36$
$2×(\quad\quad) = 82$ $2×(\quad\quad) = 28$ $(\quad\quad)×2 = 64$
$2×(\quad\quad) = 48$ $6×(\quad\quad) = 60$ $82 - (\quad\quad) = 34$
$(\quad\quad)×3 = 69$ $(\quad\quad)×9 = 45$ $(\quad\quad)×3 = 66$
答案
34 12 15
22 11 12
41 14 32
24 10 48
23 5 22
22 11 12
41 14 32
24 10 48
23 5 22
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