⑴ 四年级简便运算在线答高分
405×(3076-2980)+2136÷89
(12+20)×5=12×5+20×5
(72+28)×6=72×6+28×6
(125+65)×8=125×8+65×8
25×16=25×4×4=100×4=400
100—(32+540÷18)
165+204+335+96
(165+335)+(204+96)
78+53+47+22
(53+47)+(78+22)
(36+64)+18
36+18+64
127+352+73+44
25+71+75+29 +88
243+89+111+57
(181+2564)+2719
378+44+114+242+222
276+228+353+219
(375+1034)+(966+125)
(2130+783+270)+1017
99+999+9999+99999 567-55-145 470-254-46
263-96-104 970-132-68
400-185-15 472-126-124
168-28-72 437-137-63
244+182+56 200-173-27
124+68+76263-96-104 970-132-68
400-185-15 472-126-124