821 - 80 = 620 - 214 = 700 + 704 =
720 - 302 = 570 + 411 = 450 - 401 =
424 - 50 = 260 - 44 = 860 + 54 =
780 - 202 = 210 + 407 = 404 + 400 =
910 - 808 =
720 - 302 = 570 + 411 = 450 - 401 =
424 - 50 = 260 - 44 = 860 + 54 =
780 - 202 = 210 + 407 = 404 + 400 =
910 - 808 =
答案:
740 - 707 = 670 - 380 = 670 - 633 =
200 + 205 = 510 + 125 = 450 + 310 =
200 - 110 = 420 + 407 = 620 - 254 =
940 - 390 = 800 + 330 = 400 + 506 =
730 + 215 =
200 + 205 = 510 + 125 = 450 + 310 =
200 - 110 = 420 + 407 = 620 - 254 =
940 - 390 = 800 + 330 = 400 + 506 =
730 + 215 =
答案:
330 + 405 = 30 + 109 = 20 + 966 =
880 - 127 = 901 - 600 = 990 - 55 =
850 - 80 = 300 + 307 = 477 + 340 =
230 + 460 = 30 + 505 = 370 - 207 =
206 + 690 =
880 - 127 = 901 - 600 = 990 - 55 =
850 - 80 = 300 + 307 = 477 + 340 =
230 + 460 = 30 + 505 = 370 - 207 =
206 + 690 =
答案:
在$\square$里填上合适的数字。
$\begin{array}{r}\square81\\+\square5\square\\\hline\square94\square\end{array}$ $\begin{array}{r}8\square\\+\square\square8\\\hline\square\square22\end{array}$
$\begin{array}{r}\square81\\+\square5\square\\\hline\square94\square\end{array}$ $\begin{array}{r}8\square\\+\square\square8\\\hline\square\square22\end{array}$
答案:
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