1- + = | 1÷ × = | 0.5- +0.5- = | 8.1+ = | ( + )×24= |
7÷ ×7÷ = | 9-0.9= | 72÷0.4= | 1.25×8= | 0×24+5= |
1- + = , | 1÷ × = , | 0.5- +0.5- =0.6, | 8.1+ =8.35, | ( + )×24=14, |
7÷ ×7÷ = , | 9-0.9=8.1, | 72÷0.4=180, | 1.25×8=10, | 0×24+5=5. |
分析:(
+
)×24运用乘法分配律简算;其它题目根据运算法则和运算顺序逐步求解即可.
点评:口算题目要求快速准确,能运用简算方法的要简算.
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