Multiplying by tens and hundreds

Multiplying numbers by multiples of 10 and 100, like 34 × 20, using facts and place value.

Make a sheet Download PDFThe PDF has this sheet, its answer key and a guide for grown-ups.

How to help

Multiply without the zeros, then put them back: 34 × 20 is 34 × 2 tens, which is 68 tens, or 680. And 34 × 200 is 68 hundreds, or 6,800.

multiple of 10a number ending in 0: 10, 20, 30
place valuewhat a digit is worth from where it sits
factora number being multiplied
productthe answer to ×

Watch for: Dropping the zero: 34 × 20 = 68. Adding a zero too many: 34 × 20 = 6,800. Losing a zero when the fact itself ends in 0: 56 × 50 = 2,800, not 280.

At home: Work out costs in tens: 12 tickets at $20 each is 12 × 2 tens = 24 tens, or $240.

Sample sheet and answer key

Luna's Space Adventure

Grade 4 · Multiplying by tens and hundreds · 4.NOS.B.4

NameDate

Astronaut Luna is exploring a far-off corner of space. Solve each problem to help Luna's mission go smoothly!

See the pattern

Each answer is ten times the one before it.

44 × 3 =44 × 30 =44 × 300 =25 × 2 =25 × 20 =25 × 200 =

Times tens and hundreds

34 × 20 is 34 × 2 tens: 68 tens, or 680.

98 × 20 =191 × 20 =44 × 60 =96 × 50 =373 × 20 =85 × 90 =67 × 20 =253 × 40 =57 × 50 =

Riddle time

Solve each one, then use the code to answer the riddle.

What holds the moon up in the sky?

134 × 20 = 230 × 21 = 321 × 30 = 437 × 50 = 523 × 40 = 630 × 15 = 732 × 30 = 840 × 17 = 928 × 20 =

450 = E520 = X560 = S580 = Q630 = O680 = M740 = G920 = B960 = A1150 = K1850 = N

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Sheet

Luna's Space Adventure

Grade 4 · Multiplying by tens and hundreds · 4.NOS.B.4

Answer key

Astronaut Luna is exploring a far-off corner of space. Solve each problem to help Luna's mission go smoothly!

See the pattern

Each answer is ten times the one before it.

44 × 3 =13244 × 30 =132044 × 300 =1320025 × 2 =5025 × 20 =50025 × 200 =5000

Times tens and hundreds

34 × 20 is 34 × 2 tens: 68 tens, or 680.

98 × 20 =1960191 × 20 =382044 × 60 =264096 × 50 =4800373 × 20 =746085 × 90 =765067 × 20 =1340253 × 40 =1012057 × 50 =2850

Riddle time

Solve each one, then use the code to answer the riddle.

What holds the moon up in the sky?

134 × 20 = 680230 × 21 = 630321 × 30 = 630437 × 50 = 1850523 × 40 = 920630 × 15 = 450732 × 30 = 960840 × 17 = 680928 × 20 = 560

450 = E520 = X560 = S580 = Q630 = O680 = M740 = G920 = B960 = A1150 = K1850 = N

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Answer key

New problems every time, three levels (gentle, core and stretch), themes to pick from, a second page if you want one. Each sheet comes with an answer key and a one-page guide for grown-ups.

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Standard

Maryland 2025 4.NOS.B.4 · Multiply multi-digit numbers by multiples of 10, like 34 × 20, using place value.

Also: Texas TEKS 4.4B · Florida B.E.S.T. MA.3.NSO.2.3

Drill sheets for more practice

Multiplying by multiples of 10

More grade 4 sheets: more from state standards

Quick times and division facts