=30-2x2.6+0.2x2.6

=30-5.2+0.52

=30+0.52-5.2

=30.52-5.2

=25.32

1.25×4.2 Simple method of fifth grade math problems = 1.25×(4+0.2)

= 1.25×4+ 1.25×0.2

=5+0.25

=5.25

Use a simple method to calculate the following question: It seems that I forgot to upload the question.

Please upload photos of the original topic.

How to divide 0.77/3.5 in the fifth grade math problem by 3.5=0.2+0.02=0.22 with a simple method?

What is the simple calculation method of 0.8 times 75.6 times 12.5? The fifth grade math problem is 0.8X75.6X 12.5.

= 75.6 times (0.8X 12.5)

=75.6X 10

=756

1. Math problems in the fifth grade of primary school (calculated by your favorite method-)14/5-3/10+2/3

=8/ 10-3/ 10+2/3

=5/ 10+2/3

= 1/2+2/3

=3/6+4/6

=7/6

2)4/3- 1/ 1 1- 10/ 1 1

=4/3-( 1/ 1 1+ 10/ 1 1)

=4/3- 1

= 1/3

How to calculate the fifth grade math problem 45×0.58 5.5× 15.8 How to calculate the fifth grade math problem 45×0.58 5.5× 15.8?

45×0.58+ 5.5× 15.8

=26. 1+86.9

= 1 13

How to solve the fifth grade mathematics 19999*6/99994 by simple formula deformation?

=(20000- 1)*6/(20000*5-6)

=(20000*5-6+20000)/(20000*5-6)

= 1+ 20000/99994

Math problems in grade five (9 1×3-89×3=6-point backward method)

A is six points more than Ding.

D: 95-3=92 points.

A: 95+3=98 points.

A fifth grade math application problem in a primary school 120÷4=30(cm? )

30÷5=6 cm

6+5= 1 1 (cm)

6×6× 1 1=396(cm？ )

Is the size of this cuboid 396 cm? .