题目内容
口算.
60+30= | 66-3= | 75-40= | 36+23= | 10+30+52= | 90-20= |
30+48= | 74-50= | 54-21= | 80-50+40= | 10+40= | 83+6= |
56+40= | 6+32= | 25+40-32= | 43+2= | 45-20= | 68-30= |
0+40= | 70+20-60= |
分析:按照整数加减法的计算方法进行计算.
解答:
故答案为:90,63,35,59,92,70,78,24,33,70,50,89,96,38,33,45,25,38,40,30.
解:60+30=90, | 66-3=63, | 75-40=35, | 36+23=59, | 10+30+52=92, | 90-20=70, |
30+48=78, | 74-50=24, | 54-21=33, | 80-50+40=70, | 10+40=50, | 83+6=89, |
56+40=96, | 6+32=38, | 25+40-32=33, | 43+2=45, | 45-20=25, | 68-30=38. |
0+40=40, | 70+20-60=30. |
点评:此题考查整数加减法的计算方法,要注意看准运算符号,正确计算.
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