2. Decimal calculation

1.07+3.54+0.93+5.462.5× 16.8×0.04

0.875×36+5.6+3.5? 0.8×[(40.5÷8. 1)÷8]

3.28×8.4+67.2×0.84? 0. 18×[( 12.5+ 1.5)÷2.5]

3. Solve the equation

4.2×8-0.3x=3 1.5？ 2.5x-5=0.38+0.62

6x÷3=54.62+23x= 1 17

4. Score calculation