330 - 80 = 80 + 600 = 450 - 170 =
320 - 60 = 700 + 60 = 180 + 660 =
40 + 200 = 350 + 300 = 950 - 400 =
750 - 640 = 700 + 40 =
320 - 60 = 700 + 60 = 180 + 660 =
40 + 200 = 350 + 300 = 950 - 400 =
750 - 640 = 700 + 40 =
答案:
254 + 201 = 798 + 134 = 478 - 44 =
112 - 96 = 126 + 520 = 463 - 219 =
539 + 140 = 956 - 132 = 151 + 203 =
29 + 439 = 945 - 813 =
112 - 96 = 126 + 520 = 463 - 219 =
539 + 140 = 956 - 132 = 151 + 203 =
29 + 439 = 945 - 813 =
答案:
802 + 90 = 610 - 390 = 923 - 320 =
363 + 60 = 133 + 100 = 132 + 800 =
763 + 40 = 314 + 400 = 280 + 99 =
281 + 400 = 710 + 190 =
363 + 60 = 133 + 100 = 132 + 800 =
763 + 40 = 314 + 400 = 280 + 99 =
281 + 400 = 710 + 190 =
答案:
把0,2,4,6,7,9填入下面的$\square$里,使竖式的和是最大的三位数。
$\begin{array}{r}\square\square\square\\+\square\square\square\\\hline(\quad\quad)\end{array}$
$\begin{array}{r}\square\square\square\\+\square\square\square\\\hline(\quad\quad)\end{array}$
答案:
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