34+35+36+37使等式成立

蔺浩适472032+35+38+36+37+34+33+39+35+31的简便方法 -
花衫闸18585035155 ______ 简便计算32+35+38+36+37+34+33+39+35+31=35*10=350

蔺浩适4720三年级数学31+32+33+34+35+36+37=()*()
花衫闸18585035155 ______ 该题共7个数,因为31+37=32+36=33+35=68,68/2=34,也就是: 31+32+33+35+36+37=68*3=34*6;所以,31+32+33+34+35+36+37 =(34)*(6+1)=(34)*(7).

蔺浩适472031+32+33+34+35+36+37等于34乘括号等于括号. -
花衫闸18585035155 ______ 31+32+33+34+35+36+37=34*(7)=(238).

蔺浩适4720计算:33*34+34*35+35*36+36*37+37*38=______. -
花衫闸18585035155 ______[答案] 解;33*34+34*35+35*36+36*37+37*38, =33*(35-1)+34*35+35*36+(35+1)*37+(35+2)*38, =33*35-33+34*35+35*36+35*37+37+35*38+2*38, =35*(33+34+36+37+38)-33+37+76, =35*(200-22)+80, =7000-770+80, =6310.

蔺浩适472031+32+33+34+35+36+37+38+39用简便办法计算 -
花衫闸18585035155 ______ 34x9应该是这样

蔺浩适472031+32+33+34+35+36+37=34x什么=什么 -
花衫闸18585035155 ______ 34x7=238

蔺浩适472030+31+32+33+34+35+36+37+38+39怎么简便 -
花衫闸18585035155 ______ 这是个等差数列,可以用公式:(首项+末项)x项数➗2.所以答案是:30+31+32+33+34+35+36+37+38+39=(30+39)x10➗2=345

蔺浩适472032÷7+33÷7+34÷7+35÷7+36÷7+37÷7+38÷7这题怎做? -
花衫闸18585035155 ______ 都除以7的话就把前面的都先加起来再除以7 算式=(32+33+34+35+36+37+38)/7=35

蔺浩适47203.3*3.4+3.4*3.5+35.*3.6+3.6*3.7简算 -
花衫闸18585035155 ______[答案] =(33*35+34*35+35*36+35*37-33+37)/100 =(4*35*35+4)/100 =4904/100 =49.04

蔺浩适472033+34+35+36+37+38+39+40简算 -
花衫闸18585035155 ______ 33+34+35+36+37+38+39+40=(33+40)*(40-33+1)÷2=73*8÷2=292