=4.56+4.44 + 37+47

=9+84

=93

.

23-8/9× 3/8 ÷ 1/27

=23-3 1×27

=23- 9

= 14

.

3.07× 10 1-3.07

=3.07×( 10 1- 1)

=3.07× 100

=307

.

8.92×7.9+2. 1×8.92+28.9

=8.92×(7.9+2. 1)+28.9

=8.92× 10+28.9

=89.2 + 28.9

=90 - 0.8 + 28 + 0.9

= 1 18 +0. 1

= 1 18. 1

.

9/ 10×5/9+4/9×9/ 10+9/ 10

=(9/ 10)×(5/9+4/9 + 1)

=(9/ 10)×2

=9/5

= 1 4/5