题目内容
37.2×99+37.2= | 25×4÷0.25×4= | 0.9×7+10.7= |
9÷5-1.9÷5﹦ | 6.8-2.4÷3= | 0.6÷0.3+0.5= |
1.9+5.1÷51= | 12-0.05×4= | 1.8÷0.9×0.5= |
1×0.01÷0.1= | 7.2-1.2+6.7= |
分析:(1)运用乘法分配律简算;(2)调整运算顺序,进行简算;(3)先算乘法,再算加法;(4)先算除法,再算减法;(5)先算除法,再算减法;(6)先算除法,再算减法;(7)先算除法,再算加法;(8)先算乘法,再算减法;(9)(10)(11)从前向后依次计算.
解答:解:37.2×99+37.2=372; 25×4÷0.25×4=1600; 0.9×7+10.7=17;
9÷5-1.9÷52.18; 6.8-2.4÷3=6; 0.6÷0.3+0.5=2.5;
1.9+5.1÷51=2; 12-0.05×4=11.8; 1.8÷0.9×0.5=1;
1×0.01÷0.1=0.1; 7.2-1.2+6.7=12.7.
故答案为:372,1600,17,52.18,6,2.5,2,11.8,1,0.1,2.7.
9÷5-1.9÷52.18; 6.8-2.4÷3=6; 0.6÷0.3+0.5=2.5;
1.9+5.1÷51=2; 12-0.05×4=11.8; 1.8÷0.9×0.5=1;
1×0.01÷0.1=0.1; 7.2-1.2+6.7=12.7.
故答案为:372,1600,17,52.18,6,2.5,2,11.8,1,0.1,2.7.
点评:考查了四则混合运算,注意运算顺序和运算法则,灵活运用所学的运算律简便计算.
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