A-A+
(1)25×167×78=______×(______×______)(2)58×23×81
问题详情
(1)25× (1)25×167×78=25×(167×78);16 7× 7 8=______×(______×______)
(2)5 8× 2 3× 8 15=(______×______)×______
(3)2 29×(15× 29 31)=______×(______×______)
(4)253 4×4=______×______+______×______
(5)7×7 8=______×__________________×______
(6)14 5×25=______×__________________×______
(7)54×(8 9- 5 6)=______×__________________×______.
参考答案
(2)58×23×815=(58×815)×23;
(3)229×(15×2931)=15×(2931×229);
(4)2534×4,
=(25+34)×4,
=25×4+35×4;
(5)7×78,
=(8-1)×78,
=8×78-1×78;
(6)145×25,
=(1+45)×25,
=1×25+45×25;
(7)54×(89-56)=54×89-54×56.
故答案为:(1)25,167,78;(2)58,815,23;(3)15,2931,229;(4)25,4,35,4;(5)8,78,-,1,78;
(6)1,25,+,45,25;(7)54,89,-,54,56.考点: