Traditional Culture Encyclopedia - Photography and portraiture - Beijing Normal University Edition Grade Five Mathematics Textbook Page 27 Answer (Urgent)

Beijing Normal University Edition Grade Five Mathematics Textbook Page 27 Answer (Urgent)

2 、( 6.5× 10.5+ 10.5×3.8)×2 = 10.5×(6.5+3.8)×2+2 16.3(cm? )

3 、( 54×95+50×95)×2+54×50=22460(cm? )

4、3×3×5=45(dm? )

5、3.5×3+(3.5×3+3×3)×2-4.5=45(m? )

Step 6: Choose ①