2026年天天练口算四年级数学下册人教版第15页答案
4
填一填，使计算简便
$134 + 253 + 66 + 47 = ($
$+ $
$) + ($
$+ $
$) =$
$(72 + 65) + (28 + 35) = ($
$+ $
$) + ($
$+ $
$) =$
$(131 + 53 + 29) + 347 = ($
$+ $
$) + ($
$+ $
$) =$
$39 + 61 + 75 + 25 + 50 = ($
$+ $
$) + ($
$+ $
$) + $
$=$
$268 - 47 - 53 =$
$◯ ($
$◯ $
$) =$
$3300 - 229 - 71 =$
$◯ ($
$◯ $
$) =$
$774 - 176 - 24 =$
$◯ ($
$◯ $
$) =$
$1224 - 87 - 13 =$
$◯ ($
$◯ $
$) =$
$256 - 48 - 56 =$
$=$
$479 - 199 - 279 =$
$=$
$173 + 166 - 73 =$
$=$
$9 × 6 = 54$
$99 × 96 = 9504$
$999 × 996 = 995004$
$9999 × 9996 = 99950004$
$99999 × 99996 = ($
$)$
$999999 × 999996 = ($
$)$
$9999999 × 9999996 = ($
$)$

答案

134 + 253 + 66 + 47 = (134 + 66) + (253 + 47) = 200 + 300 = 500
(72 + 65) + (28 + 35) = (72 + 28) + (65 + 35) = 100 + 100 = 200
(131 + 53 + 29) + 347 = (131 + 29) + (53 + 347) = 160 + 400 = 560
39 + 61 + 75 + 25 + 50 = (39 + 61) + (75 + 25) + 50 = 100 + 100 + 50 = 250
268 - 47 - 53 = 268 - (47 + 53) = 268 - 100 = 168
3300 - 229 - 71 = 3300 - (229 + 71) = 3300 - 300 = 3000
774 - 176 - 24 = 774 - (176 + 24) = 774 - 200 = 574
1224 - 87 - 13 = 1224 - (87 + 13) = 1224 - 100 = 1124
256 - 48 - 56 = 256 - 56 - 48 = 200 - 48 = 152
479 - 199 - 279 = 479 - 279 - 199 = 200 - 199 = 1
173 + 166 - 73 = 173 - 73 + 166 = 100 + 166 = 266
99999 × 99996 = 9999500004
999999 × 999996 = 999995000004
9999999 × 9999996 = 99999950000004