一、口算。
$5 + 6 =$ $13 + 60 =$ $82 - 5 + 7 =$
$9 + 54 =$ $48 - 9 =$ $54 + 30 - 8 =$
$14 - 7 =$ $38 + 20 =$ $69 - 60 + 35 =$
$32 + 30 =$ $26 - 9 =$ $10 + 43 - 6 =$
$64 - 20 =$ $40 + 50 =$ $38 - 9 - 10 =$
$59 + 3 =$ $81 - 5 =$ $35 + 5 + 9 =$
$91 - 4 =$ $5 + 85 =$ $96 - 70 + 2 =$
$39 + 3 =$ $60 - 7 =$ $77 + 4 - 8 =$
$84 - 5 =$ $75 + 20 =$ $91 - 6 - 40 =$
$76 + 8 =$ $96 - 9 =$ $24 + 8 + 60 =$
$5 + 6 =$ $13 + 60 =$ $82 - 5 + 7 =$
$9 + 54 =$ $48 - 9 =$ $54 + 30 - 8 =$
$14 - 7 =$ $38 + 20 =$ $69 - 60 + 35 =$
$32 + 30 =$ $26 - 9 =$ $10 + 43 - 6 =$
$64 - 20 =$ $40 + 50 =$ $38 - 9 - 10 =$
$59 + 3 =$ $81 - 5 =$ $35 + 5 + 9 =$
$91 - 4 =$ $5 + 85 =$ $96 - 70 + 2 =$
$39 + 3 =$ $60 - 7 =$ $77 + 4 - 8 =$
$84 - 5 =$ $75 + 20 =$ $91 - 6 - 40 =$
$76 + 8 =$ $96 - 9 =$ $24 + 8 + 60 =$
答案
一、11 73 84
63 39 76
7 58 44
62 17 47
44 90 19
62 76 49
87 90 28
42 53 73
79 95 45
84 87 92
63 39 76
7 58 44
62 17 47
44 90 19
62 76 49
87 90 28
42 53 73
79 95 45
84 87 92
二、在(
(
$74 -$(
$6 +$(
36
)里填合适的数。(
36
)$+ 40 = 76$ (35
)$+ 8 = 43$ $93 -$(50
)$= 43$$74 -$(
70
)$= 4$ (59
)$- 29 = 30$ $8 +$(72
)$= 80$$6 +$(
56
)$= 62$ $9 +$(72
)$= 81$ (70
)$- 7 = 63$答案
二、36 35 50
70 59 72
56 72 70
70 59 72
56 72 70
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