80 + 330 = 890 - 70 = 650 + 130 =
100 + 6500 = 770 + 70 = 900 + 90 =
5700 + 2100 = 810 - 510 = 540 - 320 =
870 - 430 = 740 - 610 = 480 + 360 =
550 + 430 =
100 + 6500 = 770 + 70 = 900 + 90 =
5700 + 2100 = 810 - 510 = 540 - 320 =
870 - 430 = 740 - 610 = 480 + 360 =
550 + 430 =
答案:
1700 + 6100 = 830 + 120 = 2900 - 800 =
520 + 290 = 4400 + 2100 = 600 + 700 =
5200 - 200 = 820 - 650 = 740 - 680 =
250 - 50 = 4000 + 400 = 70 + 680 =
730 - 420 =
520 + 290 = 4400 + 2100 = 600 + 700 =
5200 - 200 = 820 - 650 = 740 - 680 =
250 - 50 = 4000 + 400 = 70 + 680 =
730 - 420 =
答案:
130 + 810 = 60 + 20 = 990 - 960 =
660 - 20 = 120 + 670 = 440 + 180 =
430 - 140 = 170 + 320 = 390 + 600 =
520 - 30 = 600 + 450 = 2700 + 3000 =
300 + 900 =
660 - 20 = 120 + 670 = 440 + 180 =
430 - 140 = 170 + 320 = 390 + 600 =
520 - 30 = 600 + 450 = 2700 + 3000 =
300 + 900 =
答案:
在$\square$里填上合适的数字。
$\begin{array}{r}\square9\square\\+\square\square9\\\hline500\end{array}$ $\begin{array}{r}\square\square\\+\square73\\\hline64\square\end{array}$
$\begin{array}{r}\square9\square\\+\square\square9\\\hline500\end{array}$ $\begin{array}{r}\square\square\\+\square73\\\hline64\square\end{array}$
答案:
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