小数加减法北师版数学四年级下(含答案)

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小数加减法北师版数学四年级下(含答案)

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小数加减法计算题
口算
(1)12.5+5-2.1= 3.2-1= 13.2+11= 28.8+24=
4.6+2= 6.3+4= 12.2-2= 15.3-3=
(2)1.06+2= 4.3+2= 1.5+0.12= 3.3+2.4=
2.6+4= 1.4+5= 1.7+1= 0.7+0.8=
(3)0+1.3= 1.38+4.6= 18.2+1.3= 1.96+3.6=
0.26+13= 5.6+2.8= 1.95+1.5= 1.1+5.5=
(4)3.78-1.8= 37.8-1.2= 5.98-2.6= 11.96-5.98=
7.65-0.6= 48.4-12.1= 10.1-2= 12.03-3=
(5)12.2-0.6= 5.6-0.8= 13.68-1.2= 78.2-2.3=
3.9-0.8= 11.4-9.5= 10.92-6.4= 11.9-8.5=
(6)3.6-0.9= 7.36-2.3= 0.51-0.5= 3.2-0.5=
4-2.5= 2.95-0.59= 28.5-15= 13.2-1.1=
(7)12.3+6= 6.3+0.7= 30+2.5= 0.8+32=
16.16-16= 0.36-0.3= 0.49+0.7= 0+2.3=
(8)5.8-5.2= 69.9+33= 46.9+1.4= 13+0.4=
4.2-3.2= 8.4+6= 13.8-3= 1.04+0.8=
(9)9.9-1.1= 91.83-30= 18.8-8= 42.9+11=
89.5-50= 6.85+0.5= 7.75+2.5= 64-60.8=
(10)79.75+25= 8.4-1.4= 108.9-9.9= 17.4-4=
10.64-10.5= 51.8-44.9= 20.9+1.1= 16.18+2.9=
列式计算
(1)5.28+2.4 2.21+13 0.21+0.3 0.72+6
14.6+5 12.5+2.5 4.56+3.44 14.4+3.2
(2)8.5-5 3.52-2.5 14-2.7 2.3-1.46
6.4-5.4 10.9-2.25 10-1.25 0.96-0.12
(3)42+0.12-32 9.8-5.76+0.2 2.4+36.6+12
86.1+3+15.12 2.88+1.6+1.68 58.5+1.5-0.12
(4)53.4+10-3.4 16.9+0.13+1.1 7.1+0.25 4.85+0.25
1-0.25 0.6+2+3.4 36.8+1.6-9 4.68+1.2
(5)5.6+1.4 24.32+6.4 5.2+5.8 2.6-0.13
4+0.4 9.18+9 6+0.12-3.12 1.12+0.56
(6)0.2+0.01 7-0.28 8.4+4.2 0.21+1.4
1.55+3.1 3.81-1.27 6.8+0.16 10.4-0.52
(7)6.72+6.4 16.8-2.8 38.4+0.8 101.7+9
0.39+7.8 3.6-2.5+2.6 39.6+24 85.44+24
(8)1.5-0.06 2.7+7.5 23.04+6.96 3.7+0.5
1.35+27-28 11.97+1.5+3.03 67.5+1.5 56.7-0.7
参考答案
口算题
(1)19.6; 2.2; 24.2; 52.8
6.6; 10.3; 10.2; 12.3
(2)3.06; 6.3; 1.62; 5.7
6.6; 6.4; 2.7; 1.5
(3)1.3; 5.98; 19.5; 5.56
13.26; 8.4; 3.45; 6.6
(4)1.98; 36.6; 3.38; 5.98
7.05; 36.3; 8.1; 9.03
(5)11.6; 4.8; 12.48; 75.9
3.1; 1.9; 4.52; 3.4
(6)2.7; 5.06; 0.01; 2.7
1.5; 2.36; 13.5; 12.1
(7)18.3; 7; 32.5; 32.8
0.16; 0.06; 1.19; 2.3
(8)0.6; 102.9; 48.3; 13.4
1; 14.4; 10.8; 1.84
(9)8.8; 61.83; 10.8; 53.9
39.5; 7.35; 10.25; 3.2
(10)104.75; 7; 99; 13.4
0.14; 6.9; 22; 19.08
二、列式计算
(1)7.98; 15.21; 0.51; 6.72
19.6; 15; 8; 17.6
(2)3.5; 1.02; 11.3; 0.84
1; 8.65; 8.75; 0.84
(3)10.12; 4.24; 51
104.22; 2.8; 59.88
(4)60; 18.13; 7.35; 5.1
0.75; 6; 29.4; 5.88
(5)7; 30.72; 11; 2.47
4.4; 18.18; 3; 1.68
(6)0.21; 6.72; 12.6; 1.61
4.65; 2.54; 6.69; 9.98
(7)13.12; 14; 39.2; 110.7
8.19; 3.7; 63.6; 109.44
(8)1.44; 10.2; 29.73; 4.2
0.35; 16.5; 69; 56

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