题目内容
| 算一算 7800÷25÷4 | 376-178-22 | 67×99 |
| 125×38×8 | 57×134-43×134 | 125×88. |
(1)7800÷25÷4
=7800÷(25×4)
=7800÷100
=78;
(2)376-178-22
=376-(178+22)
=376-200
=176;
(3)67×99
=67×(100-1)
=67×100-67×1
=6700-67
=6633;
(4)125×38×8
=125×8×38
=1000×38
=38000;
(5)57×134-43×134
=(57-43)×134
=14×134
=1876;
(6)125×88
=125×8×11
=1000×11
=11000.
=7800÷(25×4)
=7800÷100
=78;
(2)376-178-22
=376-(178+22)
=376-200
=176;
(3)67×99
=67×(100-1)
=67×100-67×1
=6700-67
=6633;
(4)125×38×8
=125×8×38
=1000×38
=38000;
(5)57×134-43×134
=(57-43)×134
=14×134
=1876;
(6)125×88
=125×8×11
=1000×11
=11000.
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