一、口算。
63+8= 67-5= 46-5-3=
9×0= 45+5= 63+9-2=
65+30= 41-6= 76-40+6=
63-8= 37+20= 20+40+22=
2+68= 27+7= 13-7+30=
78-20= 7+42= 57+8+3=
72+9= 56+30= 24+40-5=
6×0= 18+6= 77-30+5=
48+4= 17-8= 24+9-30=
88-30= 77-50= 84-30+6=
63+8= 67-5= 46-5-3=
9×0= 45+5= 63+9-2=
65+30= 41-6= 76-40+6=
63-8= 37+20= 20+40+22=
2+68= 27+7= 13-7+30=
78-20= 7+42= 57+8+3=
72+9= 56+30= 24+40-5=
6×0= 18+6= 77-30+5=
48+4= 17-8= 24+9-30=
88-30= 77-50= 84-30+6=
答案
63+8=71 67-5=62 46-5-3=38
9×0=0 45+5=50 63+9-2=70
65+30=95 41-6=35 76-40+6=42
63-8=55 37+20=57 20+40+22=82
2+68=70 27+7=34 13-7+30=36
78-20=58 7+42=49 57+8+3=68
72+9=81 56+30=86 24+40-5=59
6×0=0 18+6=24 77-30+5=52
48+4=52 17-8=9 24+9-30=3
88-30=58 77-50=27 84-30+6=60
9×0=0 45+5=50 63+9-2=70
65+30=95 41-6=35 76-40+6=42
63-8=55 37+20=57 20+40+22=82
2+68=70 27+7=34 13-7+30=36
78-20=58 7+42=49 57+8+3=68
72+9=81 56+30=86 24+40-5=59
6×0=0 18+6=24 77-30+5=52
48+4=52 17-8=9 24+9-30=3
88-30=58 77-50=27 84-30+6=60
二、看图写算式。
1.
$□ × □ = □$
2.
$□ × □ + □ = □$
1.
$□ × □ = □$
2.
$□ × □ + □ = □$
答案
1. $4×5=20$
2. $4×5+3=23$
2. $4×5+3=23$
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