Math Drills

Length (cm, mm, m) Review

D-2

Word Problems (1)

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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.

Addition (Same Units) · cm (Word Problems)1 question
Addition (Same Units) · m (Word Problems)1 question
Addition (Different Units) · m, cm (Word Problems)1 question
Addition (Different Units) · cm, mm (Word Problems)1 question
Subtraction (Different Units) · m, cm (Word Problems)1 question
Subtraction (Different Units) · cm, mm (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 store, there is tape of 24cm and 17cm. Altogether, how many cm is it? Answer □
Answer: 41cm
(2)At the construction site, there is a 6m wire and a 8m wire. How many m are there in all? Answer □
Answer: 14m
(3)At the construction site, there is a wire that is 4m25cm and another that is 3m60cm. Altogether, how many m and how many cm will it be? Answer □ □
Answer: 7m, 85cm
(4)In the arts and crafts room, there are two pieces of tape, one 5cm2mm long and the other 3cm1mm long. Altogether, how long are they, in how many cm and how many mm? Answer □ □
Answer: 8cm, 3mm
(5)At the school festival, Chloe prepared 10m60cm of ribbon. After using 4m30cm, how many m and cm are left? Answer □ □
Answer: 6m, 30cm
(6)At the park, Riley brought 17cm4mm of rope. After using 9cm2mm, how much will be left? How many cm and how many mm? Answer □ □
Answer: 8cm, 2mm

What to do next

Comparing Length and UnitsComparing Length and Units Reading

Next unit: Capacity (L, dL, mL)

Other versions of this worksheet

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