551 - 30 =
226 - 92 =
148 + 95 =
173 - 23 =
473 - 25 =
610 + 37 =
310 - 21 =
344 - 90 =
( ) + 33 = 548
( ) - 14 = 199
( ) - 17 = 491
( ) + 83 = 442
( ) - 40 = 169
226 - 92 =
148 + 95 =
173 - 23 =
473 - 25 =
610 + 37 =
310 - 21 =
344 - 90 =
( ) + 33 = 548
( ) - 14 = 199
( ) - 17 = 491
( ) + 83 = 442
( ) - 40 = 169
答案:
577 + 51 =
823 + 78 =
468 + 75 =
461 + 62 =
138 + 70 =
220 - 42 =
965 - 26 =
858 - 37 =
( ) - 69 = 36
( ) - 11 = 349
( ) + 30 = 539
( ) + 18 = 832
( ) - 36 = 921
823 + 78 =
468 + 75 =
461 + 62 =
138 + 70 =
220 - 42 =
965 - 26 =
858 - 37 =
( ) - 69 = 36
( ) - 11 = 349
( ) + 30 = 539
( ) + 18 = 832
( ) - 36 = 921
答案:
给下面的图形添上一条线段,使它符合要求。

增加2个直角 增加3个直角 增加4个直角
增加2个直角 增加3个直角 增加4个直角
答案:
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