1、口算
1.25×8=
526-3=
2、解方程
0.7χ=7 4×(χ+2)=8 3、简便运算
3.99×25×0.4
5214-(3+4)= 58=
1、口算
24÷50= 0.25×4= 0.1÷8=
2.25×4= 0.75×4=
3371118-0.125=
4-0.25=
9+3=
4+5=
χ-0.7=7 2χ-0.7=0.7 3χ+1=4χ 2χ÷4=0.5
2×(3-χ)=4 3.2χ-0.6χ=5.2 3.5χ-0.2×15=0.5 2.5χ=4×25
11.25+8-0.5
8.9+3.6+4.1+2.4
0.25×0.73×4 7.8×10.1
58345152173
6+9+8=
5+8+5=
8-5+4=
6-8二
17.6+3.9= 6.1-5.78= 0.83-0.6= 0.45+2.85=
-
3.9+6.5= 4.5÷3= 360÷0.2= 4.8×10= 70×0.14=
2、解方程
2117+χ=21
57χ-12=24
5χ+9=2
314-χ=8
31115+χ+4=8
737χ-(4-8)=8 3115+2χ=5
3.1χ÷2=1.24 3.1χ×2=15.6 8χ+2.3=18.3
3、简便运算
7.3÷0.24÷4÷73 99÷(50×1.11)+299 95.5-81÷7.5-9.2 [8+(0.5-0.2)]×0.24
(64.6-100×0.52)÷0.6+216 0.12]
6.8×(0.35+0.5×4) 3.072÷[(0.3+0.5)×
三
口算:
4.8-0.39= 7.4×1000= 87÷4= 95÷19= 0.5÷100=
25×160= 25×16= 24.72+25.7= 180×0.1= 1.16-0.6=
21.5×80= 7.7+0.6= 36×0.02= 17-0.05= 32×50=
2.2÷0.011= 0.72÷36= 112÷28= 4.85+29= 256×5=
903÷43= 60-1.5= 3.04÷0.8= 563+28= 25÷20=
4-0.68= 0.18×500= 0.77×200= 0.44÷8= 167×0.3=
四
解方程:
5χ+2χ=1.47 6χ-3χ=1.2 7χ+4.2χ=11.2 9.1χ-5.6χ=63 7.5χ+χ=10.2
15χ-χ=64 32χ+18χ=250 2.1+4χ=8.5 4.6+3χ=13 5.5χ+2=13 口算:
75÷2.5= 286÷2.86= 75×16= 3.08×30= 18χ+7χ=60 9.5χ-χ=31.45 3.2χ-1.6χ=8 32χ+16χ=0.8 3χ-4.2=0.6 5χ÷3=3.5 1.3χ+7.2=12.4 15+5χ=100 2.8χ-2=12 32χ÷8=0.4 五
308-28= 1.51+0.9= 0.648÷8= 8.3÷4= 4.5÷3= 57.2×5= 9÷150= 2.75×2= 6χ+0.4χ=9.6 6χ+0.4χ=16
0.16χ+2.5=10.5 6χ-10.7=7.3
6×2χ=168 2χ×3.4=51
4χ-2.7=7.3 2.9χ÷5=0.58
3.2χ÷4=80 1.5χ+1=3.25
32×15= 1.5÷0.09=
83÷40= 0.83÷4=
12÷400= 740÷37=
12.6÷40= 0.32+1.95=
260+80.25= 3.14=
2-0.125= 1.25-0.125= 3.14+0.01= 12.56÷
15.7÷3.14= 6.28÷31.4= 3.54÷3= 4.44÷0.111= 80×0.15=
六
解方程:
10.5+χ+21=56 χ+2χ+18=78 5χ+12.5=32.3 0.3×7+4χ=12.5
χ÷1.5-1.25=0.75 4χ-1.3×6=2.6 6χ+12.8=15.8 (χ-3)÷2=7.5
13.2χ+9χ=33.3 12χ-9χ=8.7 3.4χ-48=26.8 4.2χ+2.5χ=123
χ-0.8χ=6 3.8÷2+2χ=4.8 12χ÷5=4.8 7χ+10×0.53=7.4
3(χ+0.5)=21 0.5χ+8=23 0.5χ+3.4χ=8.58 0.48+χ-7.4=9.7
(2.7+3.7)χ=70.4 (4.5+χ)×2=13 2χ-8.15=18.17 0.32χ-0.5×4=0.56
七
口算:
0.2×0.4= 8.2+1.8= 100-35.22= 7.5÷1.5= 0.81÷9=
3÷0.5= 0.125×8= 0.125×16= 0.125×12= 4.5-0.9=
0.25×0.4= 4.8÷0.16= 0÷0.99= 3.52÷1= 3÷4=
3.6+4.7= 0.05×4= 1-0.08= 3.5×0.01= 1.25÷0.25=
3.9+0.39= 4.8+5.2= 4.8÷16= 4÷0.25= 0.001÷0.1=
1÷0.01= 2.6÷0.13= 1.96×4= 10÷25= 18÷0.3=
八
解方程:
χ-0.8χ=6 3.8÷2+2χ=4.8 3(χ+0.5)=21 3(χ-1.5)=21 0.48χ-0.19=9.41 0.48+χ-7.4=9.7 2.5χ-8.15=18.17 0.32χ-0.5×4=0.56 0.16χ÷4.8=2.5 18-9+5χ=13.5 2.4χ+1.6χ=2.2 9(χ+1.1)=18.9 6χ+2×2.5=41 7χ-3.5χ-11=24 12χ÷5=4.8 7χ+10×0.53=7.4
0.5χ+8=21 0.5χ+3.4χ=8.58
(2.7+3.7)χ=70.4 (4.5+χ)×2=13
8χ-6=48 5χ-7.8=20.2
78χ+4=82 2χ-3.4=7.2
5χ-2+1.8=3.6 3(χ-12)=2.1
3(10-2χ)=12 2(2χ+7)=42
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