1.8+0.5= 2.5-0.1= 4.8-0.2= 74+71=
48+10= 24÷12= 68÷0.68= 94.7÷0.1=
61.8÷0.6= 0.8×6.7= 3÷8= 0.12×3=
32= 8.2-2.8= 3.5÷0.7=
4
5
-
1
5
=
1
3
+
1
4
=
1
16
+
7
16
=
5.3+0.5= 46+18=
8.5-1.5= 69+10= 28.8+0.4= 40.5÷0.5=
92.7÷0.3= 0.5×1.3= 16×0.5= 4.4+0.1=
6.1-0.1= 3.3+0.6= 33.2÷0.4= 1÷0.25=
1.5×4= 6.5+1.35= 1.3-1.2=
7
8
-
1
4
=
1
2
+
3
4
=
5
6
-
1
3
=
5.7-1.7= 0.35+0.75=
0.2×1.1= 1.6÷0.4= 10÷4= 3.4÷0.2=
52÷13= 57÷19= 3.7-0.8= 29+92=
8.2+0.7= 6.5-5.6= 4.8÷0.3= 33=
1.25×8=
2
3
+
1
6
=
1
2
-
1
3
=
7
9
+
1
9
=
2.1÷0.3= 3.2×3= 2.8-1.8= 0.9×6.2=
分析:根據(jù)整數(shù)、分數(shù)、小數(shù)的加減乘除計算的方法進行計算,能簡算的要簡算.
解答:解:
1.8+0.5=2.3, 2.5-0.1=2.4, 4.8-0.2=4.6, 74+71=145,
48+10=58, 24÷12=2, 68÷0.68=100, 94.7÷0.1=947,
61.8÷0.6=103, 0.8×6.7=5.36, 3÷8=0.375, 0.12×3=0.36,
32=9, 8.2-2.8=5.4 3.5÷0.7=5,
4
5
-
1
5
=
3
5
,
1
3
+
1
4
=
7
12
,
1
16
+
7
16
=
1
2
,
5.3+0.5=5.8, 46+18=64,
8.5-1.5=7, 69+10=79, 28.8+0.4=29.2, 40.5÷0.5=81,
92.7÷0.3=309, 0.5×1.3=0.65, 16×0.5=8, 4.4+0.1=4.5,
6.1-0.1=6, 3.3+0.6=3.9, 33.2÷0.4=83, 1÷0.25=4,
1.5×4=6, 6.5+1.35=7.85, 1.3-1.2=0.1,
7
8
-
1
4
=
5
8
,
1
2
+
3
4
=
5
4
5
6
-
1
3
=
1
2
,
5.7-1.7=4, 0.35+0.75=1.1,
0.2×1.1=0.22, 1.6÷0.4=4, 10÷4=2.5, 3.4÷0.2=17,
52÷13=4, 57÷19=3, 3.7-0.8=2.9, 29+92=121,
8.2+0.7=8.9, 6.5-5.6=0.9, 4.8÷0.3=16, 33=27,
1.25×8=10,
2
3
+
1
6
=
5
6
,
1
2
-
1
3
=
1
6
,
7
9
+
1
9
=
8
9
,
2.1÷0.3=7, 3.2×3=9.6, 2.8-1.8=1, 0.9×6.2=5.58.
故答案為:2.3,2.4,4.6,145,58,2,100,947,103,5.36,0.375,0.36,9,5.4,5,
3
5
,
7
12
,
1
2
,5.6,64,7,79,29.2,81,309,0.65,8,4.5,6,3.9,83,4,6,7.85,0.1,
5
8
,
5
4
1
2
,4,1.1,0.22,4,2.5,17,4,3,2.9,121,8.9,0.9,16,27,10,
5
6
,
1
6
,
8
9
,7,9.6,1,5.58.
點評:計算時,要靈活運用所學的知識,快速準確的進行計算.
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