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一、口算。
$98 - 40 =$ $12 + 30 =$ $49 - 9 - 20 =$
$52 + 20 =$ $8 + 6 =$ $63 - 7 + 10 =$
$37 - 8 =$ $75 + 10 =$ $44 + 50 - 8 =$
$70 + 11 =$ $60 - 5 =$ $72 - 5 + 10 =$
$16 - 9 =$ $24 + 40 =$ $69 + 8 + 4 =$
$6 + 67 =$ $73 - 4 =$ $37 + 5 - 40 =$
$75 - 9 =$ $55 + 8 =$ $84 - 50 + 7 =$
$38 + 30 =$ $71 - 20 =$ $45 + 6 - 9 =$
$61 - 50 =$ $49 + 50 =$ $90 - 8 - 50 =$
$4 + 36 =$ $92 - 80 =$ $66 + 7 + 20 =$
$98 - 40 =$ $12 + 30 =$ $49 - 9 - 20 =$
$52 + 20 =$ $8 + 6 =$ $63 - 7 + 10 =$
$37 - 8 =$ $75 + 10 =$ $44 + 50 - 8 =$
$70 + 11 =$ $60 - 5 =$ $72 - 5 + 10 =$
$16 - 9 =$ $24 + 40 =$ $69 + 8 + 4 =$
$6 + 67 =$ $73 - 4 =$ $37 + 5 - 40 =$
$75 - 9 =$ $55 + 8 =$ $84 - 50 + 7 =$
$38 + 30 =$ $71 - 20 =$ $45 + 6 - 9 =$
$61 - 50 =$ $49 + 50 =$ $90 - 8 - 50 =$
$4 + 36 =$ $92 - 80 =$ $66 + 7 + 20 =$
答案
一、58 42 20
72 14 66
29 85 86
81 55 77
7 64 81
73 69 2
66 63 41
68 51 42
11 99 32
40 12 93
72 14 66
29 85 86
81 55 77
7 64 81
73 69 2
66 63 41
68 51 42
11 99 32
40 12 93
二、算一算，填一填。
和：(
差：(
和：(
49
) 和：(93
) 和：(52
) 和：(93
)差：(
43
) 差：(79
) 差：(36
) 差：(33
)答案
二、49 93 52 93
43 79 36 33
43 79 36 33
