Add and subtract lengths-Your turn12

How much ribbon is left?

• Step 1 ( 5 m x 100 =500 cm)

  Step 2 (500-78 = 422 cm)

  Step 3 (400 cm = 4 m)

  Answer

  4 m and 22 cm

• I don't know any steps

• I just guess

• Step 1 ( 5 m x 10=50 cm)

  Step 2 (50-10 = 40 cm)

  Step 3 (40 cm = 0.4 m)

  Answer

  0.4 m and 0 cm

Complete the number sentence.

• Step 1 ( 2 m x 100 =200 cm)

  Step 2 (200-50 = 150 cm)

  Answer

  150 cm

• I don't know any steps

• I just guess

• Step 1 ( 2 m x 10 =20 cm)

  Step 2 (20-5 = 25 cm)

  Answer

  25 cm

Complete the number sentence.

• Step 1 ( 85 mm / 10 =8.5 cm)

  Step 2 (8.5-2 = 6.5 cm)

  Step3 (6.5 mm x 10 = 65

  Answer

  65 mm

• I don't know any steps

• I just guess

• Step 1 ( 2 m x 10 =20 cm)

  Step 2 (20-5 = 25 cm)

  Answer

  25 mm

Complete the number sentence.

• I just guess

• I don't know any steps

• Step 1 ( 5 mm / 10 =0.5 cm)

  Step 2 (9 cm + 0.5 cm = 9.5 cm)

  Step3 (20 mm/10 = 2 cm)

  Step 4 (9.5 cm- 2 cm = 6.5 cm

  Or

  6 cm anc 5 mm

  Answer

  65 mm

• 6 cm and 5 mm

Complete the number sentence.

• I just guess

• I don't know any steps

• 4 cm

• Step 1 ( 100 mm / 10 = 10 cm)

  Step 2 (10 cm - answer (6 cm) = 4 cm

  Answer

  4cm

How much string did Huan use to make his bow?

• I just guess

• I don't know any steps

• 205 cm

• Step 1 ( 10 m x 100 = 1000 cm)

  Step 2 (1000 cm - 50 cm = 950 cm

  Step 3 (950 cm- ? = left)

  Step 4 ( convert left over : 7 m x 100 =700 cm by adding 45 cm to it (700+45 = 745 cm

  Step 5 (950 cm - 745 cm = 205 cm

  Answer is 205 cm

  Or

  2 m and 5 cm

Rows in a table are from

• Right to left

• Left to right

• Top to bottom

• Bottom to top

Columns in a table are from

• Right to left

• Left to right

• Top to bottom

• Bottom to top

Which steps are involved in this?

• Step 1 ( converting the m in to cm

  Step 2 (start adding from top centre square)

• Left to right

• Top to bottom

• Bottom to top

First row will add ? cm

• 1) We know that 1 m is 100 cm so 2 m will be 200 cm

  2) We already have 50+50 = 100 cm. We will add 100 cm in the top centre box to make it 200 cm or 2 m

• 85 cm

• 65 cm

• 50 cm