Times Market — Lesson 89: Times practice: two-digit by one-digit

What your child does, card by card

Times practice: two-digit by one-digit. Practice day! PlayBuddy opens the lesson: “Practice time. Let's get quicker and better.”

First a reminder (“34 × 5”): the beads build 100, 150 and 170, ring by ring, while your child watches. 30 × 5 is 150. 4 × 5 is 20. Together: 170.

Try it: your child works out 26 × 3, with a green ring on the next bead to move.

Fast sums: a mission of 8 tasks with a clock against your child’s own best time. Your child must work out 43 × 6, 58 × 2, 37 × 4 and 69 × 7.

Then the beads hide and the sums 30 × 3, 20 × 7 and 40 × 5 are done in the head, the answer picked from 90, 140 and 200.

You're ready! Two-digit times one-digit, part by part.

What this lesson trains

13 answers, roughly five minutes: 25 moves of the beads, 7 of them with the top bead and 18 with bottom beads. Up to 483, read and set from the left. Then 3 quick looks in your head. 1 of the 10 sums need a small friend (“+1 = +5 −4”); the others use free beads.

The first thing your child does: work out 26 × 3.

The sum sheet

In Column Tower the lower window is a sum sheet instead of the hands: the column written out one line under another, the line being worked in yellow, the lines done ticked, and the total once the last line is in. The beads keep the running total, so the abacus is never cleared in the middle of a column.

What PlayBuddy and PlayType say

PlayBuddy: “Big part first, then the small part.”

Stars

With 1 or fewer slips across the 13 answers your child earns three stars; 3 or fewer, two.