口算天天练
60 + 34 =
80 - 20 =
90 - 70 =
40 - 34 =
30 - 20 =
100 - 30 =
70 - 70 =
30 + 50 =
80 - 40 =
50 - 42 =
60 - 20 =
41 + 50 =
32 - 20 =
90 - 60 =
70 - 60 =
60 + 34 =
80 - 20 =
90 - 70 =
40 - 34 =
30 - 20 =
100 - 30 =
70 - 70 =
30 + 50 =
80 - 40 =
50 - 42 =
60 - 20 =
41 + 50 =
32 - 20 =
90 - 60 =
70 - 60 =
答案:
1. 想一想,算一算。
26 + $\begin{array}{|l|l|}\hline42\\\hline35\\\hline61\\\hline\end{array}$ = $\begin{array}{|l|l|}\hline\\\hline\\\hline\\\hline\end{array}$ $\begin{array}{|l|l|}\hline42\\\hline35\\\hline61\\\hline\end{array}$ -25= $\begin{array}{|l|l|}\hline\\\hline\\\hline\\\hline\end{array}$
26 + $\begin{array}{|l|l|}\hline42\\\hline35\\\hline61\\\hline\end{array}$ = $\begin{array}{|l|l|}\hline\\\hline\\\hline\\\hline\end{array}$ $\begin{array}{|l|l|}\hline42\\\hline35\\\hline61\\\hline\end{array}$ -25= $\begin{array}{|l|l|}\hline\\\hline\\\hline\\\hline\end{array}$
答案:
68 61 87 17 10 36
2.
(1)小芳剪了多少个? (2)小丽剪了多少个?
(1)小芳剪了多少个? (2)小丽剪了多少个?
答案:
(1)51个
(2)39个
(1)51个
(2)39个
3. 科技园上午有900位游客,中午有300位离去。下午又来了500位游客,这时园内有多少位游客?
答案:
1100位
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