Math Drills

Length (cm, mm, m) Review

E-4

Word Problems (2)

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What this worksheet covers

Grade: Grade 2 (Elementary School)
Topic: Length (cm, mm, m)

Everything rests on two relationships: one tenth of 1 cm is 1 mm, and 100 cm is 1 m. Starting from Measuring with a Ruler, children restate lengths between cm and mm and between m and cm, then add and subtract within one unit and across units, including the cases that carry and borrow.

Writing 8 cm 5 mm as 805 mm rather than 85 mm stands out, since the cm part is not multiplied by 10 during the conversion. In subtraction that needs borrowing, 1 cm is never exchanged for 10 mm, so the mm parts are subtracted smaller from larger and the mm in the answer comes out too big.

From a stage that only compared the lengths of objects, this unit moves on to expressing length as a number. The sense of lining up ends to compare, built in Comparing Length, becomes the foundation for measuring with units such as cm and mm, and the units keep growing into Length (km and Tape Measure) in grade 3, where km enters the picture.

Subtraction (Same Units) · cm (Word Problems)1 question
Addition (With Carrying) · cm, mm (Word Problems)1 question
Addition (With Carrying) · m, cm (Word Problems)1 question
Subtraction (Same Units) · m (Word Problems)1 question
Subtraction (With Borrowing) · cm, mm (Word Problems)1 question
Subtraction (With Borrowing) · m, cm (Word Problems)1 question

Questions & answers

Problems and answers on this worksheet

These are the problems in “Length (cm, mm, m)”, shown with their answers.

(1)At the handicraft club, Henry brought 28cm of wire. If he uses 19cm of it, how many cm will be left? Answer □
Answer: 9cm
(2)On Olivia's desk, there is ribbon that is 2cm8mm long and 5cm7mm long. Altogether, how long is it in how many cm and how many mm? Answer □ □
Answer: 8cm, 5mm
(3)On sports day, there is a rope that is 2m70cm and another that is 1m50cm. Altogether, how many m and how many cm will it be? Answer □ □
Answer: 4m, 20cm
(4)At the crafts club, Riley had 6m of wire. After cutting off 1m, how many m are left? Answer □
Answer: 5m
(5)At Grace's birthday party, there was 15cm4mm of blue ribbon. If 9cm7mm is used, how many cm and how many mm are left? Answer □ □
Answer: 5cm, 7mm
(6)At the store, there was 5m5cm of tape. If 2m35cm is cut off, how much will be left, in how many m and how many cm? Answer □ □
Answer: 2m, 70cm

What to do next

Comparing Length and UnitsComparing Length and Units Reading

Next unit: Capacity (L, dL, mL)

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